16 R. COLLETT. [No. 8. 
M. lemmus is, probably, the second in the ranks. This is due 
to the vast extent of the country that forms its home and its 
normal haunts, which may be estimated at about 900 Norwegian 
square miles (about 114,000 square kilométres), or over one third 
of the land. 
Myodes lemmus inhabits all the mountain plateaux of Norway 
situated above the zone of the coniferous trees*, from the north- 
ernmost portions of the country to the most southern ramifications 
of the Lang-Fjeld in Christiansand Stift, situated in about 
581/20 North Latitude. 
In the southern, and western coastal regions, where the 
mountains are more barren, they may appear at å somewhat 
lower elevation, and in Finmarken they are distributed over 
the open plateaux, down to the level of the sea itself. 
They are chiefly confined to the mainland, but also inhabit, 
in lesser numbers, the large rocky islands off the coast, especially 
in the northern portions of the land. 
Ås the country is, as good as, occupied throughout its en- 
tire length by mountains, the lemming thus has normal breeding 
According to Broch's Statistical Annual for the Kingdom of Norway 
("Statistisk Aarbog for Kongeriget Norge, 1871”), of the entire sur- 
face of the land over 766 Norwegian square miles (about 98,000 sq. 
kms.) are situated at a height of upwards of 3000 feet above the 
sea. To this may be added, of the northern portions of the country, 
about 58 Norwegian square miles in Tromsø, and 256 in Finmarken 
which certainly lie beneath this height, but which, nevertheless, are 
tenanted by this species: together, about 1080 Norwegian square 
miles (about 137,760 sq. kms.). If lakes and other uninhabitable 
localities are deducted, the area which, it may be assumed, will fur- 
nish suitable grounds for this species, may be estimated at about 
35 per cent. of the total surface of the land. 
The limit of the Pinus sylvestris (Red Pine) in the southernmost por- 
tions of the land (as in Thelemarken, in 599 45' N. Lat.), is about 
3000 feet, or 940 métres above the sea level; in the inland forest 
regions (as the upper districts of Österdal, in 619 20' N. Lat.) 2700 
feet, or 800 metres. 
North of the Trondhjem Fjord the limit diminishes rapidly, and 
in Namdalen (649 30' N. Lat.) it is between 1600 and 2000 feet (500 to 
630 métres); in the southern portions of Finmarken (709 N. Lat.), the 
limit is seld m above 600 to 700 feet (100 to 200 métres), Pines 
do not exist in the Northern parts of that province. 
19 
E 

